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POiOS Core Graphics PDF memory managment problem
 

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  1. POiOS Core Graphics PDF memory managment problem
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    <p>I'm reading PDF file, and then releasing it:</p> <pre><code>CFURLRef pdfURL = CFBundleCopyResourceURL(CFBundleGetMainBundle(), (CFStringRef)@"somepdf.pdf", NULL, NULL); CGPDFDocumentRef pdf = CGPDFDocumentCreateWithURL((CFURLRef)pdfURL); int pagesCount = CGPDFDocumentGetNumberOfPages(pdf); CGPDFDocumentRelease(pdf); </code></pre> <p>But the memory is not freed after release (checked that with Instruments). Why? What i'm missing in memory managment.</p> <p>Thanks.</p> <p>EDIT</p> <p>here is my code:</p> <pre><code>- (void)loadView { [super loadView]; CFURLRef pdfURL = CFBundleCopyResourceURL(CFBundleGetMainBundle(), (CFStringRef)@"some.pdf", NULL, NULL); pdf = CGPDFDocumentCreateWithURL((CFURLRef)pdfURL); CFRelease(pdfURL); CGPDFPageRef pdfPage = CGPDFDocumentGetPage(pdf, 1); TiledPDFView * v = [[TiledPDFView alloc] initWithFrame:self.view.bounds andScale:1]; [v setPage:pdfPage]; [self.view addSubview:v]; UIButton * but = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [but setTitle:@"removeView" forState:UIControlStateNormal]; [but addTarget:self action:@selector(tests) forControlEvents:UIControlEventTouchDown]; but.frame = CGRectMake(0, 0, 100, 40); [self.view addSubview:but]; } -(void) tests { [self.view removeFromSuperview]; [self.view release]; CGPDFDocumentRelease(pdf); } </code></pre> <p><code>pdf</code> is instance variable. <code>TiledPDFView</code> - is uiview from ZoomingPDFViewer example. it draws <code>CGPDFPageRef</code> using <code>CATiledLayer</code>.</p> <p>after i call <code>tests</code> method, the view is removed (becomes invisible), but the memory allocated with <code>CGPDFDocumentCreateWithURL</code> is not freed.</p>
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    1. USnegersiu
    1. USnegersiu
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      1. POiOS Core Graphics PDF memory managment problem
      1. USmacross
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    1. CO`CGPDFDocumentGetNumberOfPages` returns a `size_t`, not an `int`. `size_t` is unsigned, whereas `int` is signed, and `size_t` may be larger (in bytes, and thereby in range) than `int`. Beware of large documents that have seemingly-negative (actually just very large) numbers of pages, or that have effectively random numbers of pages (when `size_t` is larger than `int` and your number is so big that it exceeds the range of `int`, so part of the number gets lopped off). You should always use the correct type for the values you're working with.
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      1. POiOS Core Graphics PDF memory managment problem
      1. USPeter Hosey
    2. COThank you Peter, I will fix it.
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      1. POiOS Core Graphics PDF memory managment problem
      1. USnegersiu
 

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